Honor and Qualification Patent Certificates

excellent enterprises in chinas machinery industry

the most influential enterprise in henan industry

the most potential suppliers of cooperation

excellent enterprise award in export trade

most influential brand

most innovative company4

national award for science and technology progress

china coal industry science and technology progress award

certificate of quality management system

certificate of environmental management system

certificate of occupation health management system

safety certification of approval for mining products

patent of a non ferrous metallurgical furnace with variable diameter

patent of a sand mold for air induced heat conduction for casting

patent of low voltage variable frequency energy feedback braking device for motor drive circuit

patent of welding heating and heat preservation tooling for slip ring of sliding shoe mill

patent certificate of nylon ground rolling and preparation method

friction liner testing machine patent certificate

patent certificate of preparation method of friction liner

patent certificate for preparation of high wear resistance sheave liner